What’s Vulnerable › Vulnerabilities

CVE-2019-17502

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-10-12 · updated 2026-06-17
• Weakness: CWE-476

Description

Hydra through 0.1.8 has a NULL pointer dereference and daemon crash when processing POST requests that lack a Content-Length header. read.c, request.c, and util.c contribute to this. The process_header_end() function calls boa_atoi(), which ultimately calls atoi() on a NULL pointer.

Affected products

• Hydra Project Hydra: through 0.1.8

References

• http://hydra.hellug.gr
• https://gist.github.com/fxb6476/0b9883a88ff2ca40de46a8469834e16c
• http://hydra.hellug.gr
• https://gist.github.com/fxb6476/0b9883a88ff2ca40de46a8469834e16c

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